for it is written: "Be holy, because I am holy."

Leviticus 11:44
For I am the LORD your God; consecrate yourselves, therefore, and be holy, because I am holy. You must not defile yourselves by any creature that crawls along the ground.

Leviticus 11:45
For I am the LORD, who brought you up out of the land of Egypt so that I would be your God; therefore be holy, because I am holy.

Leviticus 19:2
"Speak to the whole congregation of Israel and tell them: Be holy because I, the LORD your God, am holy.

Leviticus 20:7
Consecrate yourselves, therefore, and be holy, because I am the LORD your God.

Isaiah 35:8
And there will be a highway called the Way of Holiness. The unclean will not travel it--only those who walk in the Way--and fools will not stray onto it.

Because it is written, Be you holy; for I am holy.